Sigmund neumann



' which in itself or in its solution is fluorescent UNITED STATES PATENTOFFICE.

SIGMUND NEUMANN, OF BUDA-PESTH, AUSTRIA-HUNGARY.

FLUORESCENT SOAP.

SPECIFICATION 'formingpart of Letters Patent No. 564,835, dated J uly28, 1896.

Application filed September 14, 1894. Serial No. 523,030. (Nospecimens.) Patented in Hungary August 16, 1894, No. 1,401; in AustriaAugust 22,1894,No.45/2,348; in Belgium August 22,1894,No. 111,511; inEngland August 23, 1894, No.

16,040, and in France September 4,1894,N0. 241,112.

To all whom it may concern:

Be it known that I, SIGMUND NEUMANN, of Gottergasse, Buda-Pesth, in theKingdom of Hungary and Austro-Hungarian Empire, have invented new anduseful Improvements in or Connected with the Manufacture of FluorescentSoaps, (for whichl have obtained the following foreign patents: Austria,No. 45 2,348, dated August 22, 1894; England, No. 16,040, dated August23, 1894; France, No. 241,112, dated September 4, 1894; Belgium, No.111,511, dated August 22, 1894, and Hungary, No. 1,401, dated August 16,1894,) of which the following is a specification.

This invention relates to the production of fluorescent soaps, whethercolored or not.

Ordinary opaque or non-translucent soap is capable of taking up, duringits manufacture, fluorescent bodies; but suchjfsoaps do not exhibit intheir finished state the characteristics of fluorescence.

Instead of employing ordinary non-transparent or non-translucent soapfor the purpose of my invention, I take transparent soap during thefluid state of its manufacture, and in this state I add thereto anysuitable body and which does not lose its fluorescence inthe finishedsoap. I may also add to the fluid soap such colors soluble therein asmay be desired to produce a given tint or shade. If a solid transparentsoapis to be used, the soap may be liquefied by cutting the soap tosmall pieces and dissolving therfi in alcohol at a temperature of fromto centigrade. If the alcohol contains a large quantity of water, theexcess of water'in the solution of soap may be evaporated.

The fluoresent bodies which I may employ by addition to the fluidtransparent soap for producing the fluorescence are, for example,fluorescein derivative, eosin, phloxin, erythrosin, saifranin, esculin,rhodamin, azoresorcin, azoresorufin, and their derivatives. Thefluorescent body is mixed with the fluid soap either in the dry state orin solution by efiective stirring. The soap may then be finished in theusual manner.

If it be desired to impart to the soap a different color to that whichmay be given to it by the fluorescent body, the required coloring-mattermay be addedto it after the mixture therewith of the fluorescent body.

I have found that when using fluorescein or its derivatives for thepurpose of this invention the fluorescent effect may be increased by theaddition of ammonia or ammonia compounds, and I may accordingly employthese substances in such cases.

As a rule, from one to two milligrams of the fluorescent body and of theammoniacal ingredient are mixed with one kilogram of the fluid soap. Thequantity, however, may be altered according to the nature of the soap,the fluorescent, and the ammoniacal ingredient. All ammonia compoundswhich are soluble in water, and which with the addition of causticalkali produce ammonia, may be employed, especially sal-ammoniac,sulfate of ammonia, and carbonateo fammonia. The fluorescent body, theammoniacal ingredient, and the coloring-matter can be added to the fluidsoap in any desired order.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

1. A new composition of matter consisting of transparent soap andorganic bodies which are fluorescent in a neutral or alkaline solution,substantially as described.

2. As a new article of manufacture, a fluorescent soap, consisting oftransparent soap, ammonia compounds, and organic bodies which arefluorescent in a neutral or alkaline solution, substantially asdescribed.

3. The method of making fluorescent soap, consisting in adding to fluidtransparent soap organic bodies which are fluorescent in a neutral oralkaline solution, substantially as described.

4. The method of making fluorescent soap, consisting in adding to fluidtransparent soap organic bodies which are fluorescent in a neutral oralkaline solution, and also ammonia or its compounds; substantially asdescribed.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

SIGMUND NEUMANN.

Witnesses:

HANS BAUERLEIN, MAXIMILIAN Minx.

